Physics Work & Energy NUMS 2022
PMDC Verified Question 59 of 108
The product of force and velocity is equal to:
A
Kinetic energy
B
Potential energy
C
Power
D
Work done
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Power
Concept:

Examine the dimensional units of Force multiplied by Velocity.

Formula:

$$ P = \frac{W}{t} = \frac{F \cdot d}{t} = F \cdot \left(\frac{d}{t}\right) = F \cdot v $$

Solution:

  • Force is in Newtons (N). Velocity is in meters per second (m/s).


  • Product units = N \( \times \) m/s = (N\( \cdot \)m)/s = Joules/second.


  • Joules per second is the definition of Watts, which is the unit of Power.


Why other options are incorrect:

Work done is Force \( \times \) Displacement. Kinetic and Potential energy share the same units as Work, not Power.

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